2015 Ford F-150 Problems: All 9 Known Failures | Milo
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2015 Ford F-150 problems: every known failure

All 9 documented failure points for this exact year — what goes wrong, when, what it costs, and how to spot it on a test drive. Free, from Milo's research on this model.

9known failure points
1425NHTSA owner complaints
14safety recalls
$3,500worst-case single repair

The aluminum revolution — buy the 5.0 V8, be cautious with the first-year 3.5 EcoBoost

Every documented failure, earliest first

Ordered by the mileage the problem typically appears. VERY HIGH confidence means it's tied to a documented NHTSA recall, and 4 of these are rated Critical.

40k–70k mi● Plan$150–$900MODERATE
3.5 EcoBoost intercooler condensation → misfire/shudder under boost in humid weather
How to catch it: Install a Boomba or aftermarket intercooler drain plug ($30) so trapped condensation empties instead of getting slurped into cylinders on hard acceleration.
Source: multi-source pattern (AI synthesis)
50k–90k mi● Plan$400–$800MODERATE
3.5 EcoBoost carbon buildup on intake valves (direct injection only)
How to catch it: Walnut blast the intake valves at ~70k; a can of CRC intake valve cleaner every oil change slows but does not stop it.
Source: multi-source pattern (AI synthesis)
50k–150k mi● Watch$0–$400VERY HIGH
Door latch freezing/failure — multiple recalls (16S30, etc.)
How to catch it: Confirm both door latch recalls have been completed at a Ford dealer — the fix is a latch pawl spring tab, and a huge percentage of 2015s still show open.
Source: documented (NHTSA recall)
60k–100k mi● Critical$400–$3,500MODERATE
6R80 transmission harsh 1-2 shift, unrequested downshifts, valve body/solenoid wear
How to catch it: Do a full fluid exchange (not just drain-and-fill) with Mercon LV every 60k regardless of the 'lifetime' spec — most 6R80 failures trace back to cooked fluid.
Source: multi-source pattern (AI synthesis)
60k–100k mi● Critical$0–$1,400HIGH
Electric power steering assist fault (EPAS) — sudden heavy steering, recall 15S18 covers many but not all
How to catch it: Check the VIN on Ford's recall portal for 15S18 completion; if not covered, request goodwill — many out-of-VIN trucks got fixed free by pushing the dealer.
Source: owner-reported (119 NHTSA complaints)
60k–100k mi● Critical$0–$600VERY HIGH
Brake master cylinder leak (3.5 EcoBoost) — covered by recall 20V-332
How to catch it: Verify recall 20V-332 was performed; if the pedal ever feels 'long' or the reservoir drops, get it in immediately — this one has caused crashes.
Source: documented (NHTSA recall)
70k–120k mi● Critical$1,800–$3,500VERY HIGH
3.5 EcoBoost timing chain stretch/rattle on cold start (pre-2017 chain)
How to catch it: Run 5W-30 (not 5W-20) if living in a hot climate, change oil every 5k not 10k, and if you hear a 2-second rattle on cold start — address it before the guides shred.
Source: documented (NHTSA recall)
70k–110k mi● Plan$500–$2,500MODERATE
Transfer case galvanic corrosion (4WD models) — aluminum housing eats itself around steel fasteners
How to catch it: Drain and refill transfer case fluid every 60k, and pull the case at least once to hit the mating surfaces with dielectric grease — especially if you drive in salt.
Source: multi-source pattern (AI synthesis)
80k–130k mi● Plan$1,200–$2,500MODERATE
Cam phasers rattling on 5.0 Coyote (Gen 1) at cold start
How to catch it: Strict 5k oil changes with full synthetic 5W-20; the phaser rattle is oil-pressure/oil-condition driven and rarely appears on well-maintained trucks.
Source: multi-source pattern (AI synthesis)

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Findings blend documented NHTSA recalls and complaints with patterns synthesized from owner communities. Confidence is labeled on every item; an inference is never presented as documented fact. Always inspect the specific vehicle and verify open recalls by VIN before buying.

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